[BR-41]-Each Invoice line allowance (BG-27) shall have an Invoice line allowance amount (BT-136).
BR-41pxs-taxdata:TaxData/pxs-taxdata:ReportedTransaction/pxs-taxdata:ReportedDocument/pxs-taxdata:DocumentLine/cac:AllowanceCharge[cbc:ChargeIndicator = false()]exists(cbc:Amount)